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filter flask serves as receiver, the side tube being' attached
to a calcium chloride tube. The distilling vessel is provided
with a cork, through which a tap-funnel is inserted. The flask
is cooled in cold water in the \vater-bath (outlined in Fig". 54),
whilst the phosphorus trichloride is slowly run in from the tup-
funnel.* When the phosphorus chloride has been added, the
water in the water-bath is wanned to 4050", until the evolu-
tion (if hydrochloric acid gas, which at first is very rapid, begins
to abate. The water-bath Is then heated to boiling until


Fie*. S4.

nothing  further distils.     The distillate is  no.v  redistilled as
before,  but   with  a  thermometer, and   the distillate collected

at the boiling point  of acefyl   chloride  (53    50).      Yield  45


Colourless liquid with a pungent smell ; it fumes
in contact with moist air ; b. p. 55 ' SP- g*- 1*103 at 20'.
AVvjv//Wi.v, i. Add a few drops of aeetyl chloride to about
$ c.c. of water in a test-tube. The acetyl chloride sinks to the
bottom of the test tul H% but on shaking rapidly dissolves, and
hrat is evolved. The acetyl chloride is converted into acetic acid
and hydrochloric acid.
C'H:,.CCK:i f IUO    rH:i.CO,on f HCL
2. To about i c,c, of ethyl alcohol in a test-tube, add i c.c.
of acetyl chloride drop by drop, cooling under the tap. Then